Park Avenue main line
Stations

Zone
Station
Miles (km) from GCT
Date opened
Date closed
Connections / notes
1
Grand Central TerminalHandicapped/disabled access
0.0 (0.0)
October 6, 1871
-
-
1
59th Street
-
-
-
-
1
72nd Street
-
-
-
-
1
86th Street
2.2 (3.54)
May 15, 1876
c. 1901
-
1
110th Street
3.43 (5.52)
May 15, 1876
June 17, 1906
-
1
Harlem–125th Street Handicapped/disabled access
4.2 (6.8)
October 25, 1897
-
-
Park Avenue Bridge
Park Avenue Bridge
Park Avenue Bridge
Park Avenue Bridge
Park Avenue Bridge
Park Avenue Bridge

Question: Which Park Ave Mainline stations both opened on the same day, and what day was that?
Answer: The 110th Street, and the 86th Street stations both opened on May 15, 1876.